cleanup

2026/cscg/rev/gloomweaver/trace_hook.c

@@ -0,0 +1,20 @@
+// trace_hook.c — intercept signal handler to log VM state
+#define _GNU_SOURCE
+#include <signal.h>
+#include <stdio.h>
+#include <dlfcn.h>
+
+static FILE *trace;
+
+int sigaction(int signum, const struct sigaction *act,
+              struct sigaction *oldact) {
+    // Log which signals are being registered
+    if (!trace) trace = fopen("/tmp/vm_trace.txt", "w");
+    fprintf(trace, "sigaction(%d)\n", signum);
+    fflush(trace);
+
+    // Call real sigaction
+    int (*real)(int, const struct sigaction*, struct sigaction*) =
+        dlsym(RTLD_NEXT, "sigaction");
+    return real(signum, act, oldact);
+}